/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN
 * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
 * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
 * PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF
 * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of
 * any nuclear facility.
 */

package com.sun.j2ee.blueprints.uidgen.ejb;

import javax.ejb.CreateException;
import javax.ejb.EJBException;
import javax.ejb.FinderException;
import javax.ejb.SessionContext;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import com.sun.j2ee.blueprints.uidgen.counter.ejb.CounterLocal;
import com.sun.j2ee.blueprints.uidgen.counter.ejb.CounterLocalHome;

public class UniqueIdGeneratorEJB implements javax.ejb.SessionBean {

	/**
	 * 
	 */
	private static final long serialVersionUID = -2073653435084265840L;
	private InitialContext ic;
	private CounterLocalHome clh;

	public void ejbCreate() {
		try {
			ic = new InitialContext();
			clh = (CounterLocalHome) ic.lookup("java:comp/env/ejb/Counter");
		} catch (NamingException ne) {
			throw new EJBException(
					"UniqueIdGeneratorEJB Got naming exception! "
							+ ne.getMessage());
		}
	}

	// Business Methods
	// =================
	public String getUniqueId(String idPrefix) {
		return getCounter(idPrefix).getNextValue();
	}

	// Misc Method
	// =============
	private CounterLocal getCounter(String name) {
		try {
			CounterLocal counter = null;
			try {
				counter = clh.findByPrimaryKey(name);
			} catch (FinderException fe) {
				counter = clh.create(name);
			}
			return counter;
		} catch (CreateException ce) {
			throw new EJBException("Could not create counter " + name
					+ ". Error: " + ce.getMessage());
		}
	}

	public void setSessionContext(SessionContext c) {
	}

	public void ejbRemove() {
	}

	public void ejbActivate() {
	}

	public void ejbPassivate() {
	}
}
